Power shovel



. y 12 1927- r J, D. RAUCH rowan SHOYEL Original Filed March 2. 1925 2 Sheets-Sheet l 50/ Team-Z,

July 12; 1927.

J. D. RAUCH POWER SHOVEL Original Filed March 2. 1925 2 Sheets-Sheet 2 wit/606's pivotally mounted. to swing on a vertical 'drum90arrang Patented ,July: 12,;1927.

UNlTED'S-TATES PATENT, ounce-.1

JOHN H, I IIA. euro,- ASSIGNOB To run one smart seem-cumin,

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' rowan snovn'n Original application ma larch 2 1928, SerialIo. 12,476. Intent No. 1,539,031, dated Ianuar Divided and this application filed July 29, 1925, Serial 1T0. Q6308.

- This invention relates to improvements in power shovels of the dipper type. and has for its principal object to provide'a I simple, durable an eflicient mechanism for 6 operating and controlling the dipper handle. The present application is a division of my prior application bearing Serial No; 12,476, V filed Main, 2, 1925,,which-ha's matured into Patent'No. 1,569,031, granted Jan. 12, 1926. 10 The subject matter. of the present application has encarved out of the said prior application. I y I The invention will best be understood by reference to theaccompanying drawings, in 1 which I Figure-1 isa general view in side-eleva} K 96 to provide braking action thereon. A

tion of the shovel, I-

Figure 2 is an enlarged detail view of the dip er operating mechanism. 'F igure 3 is a detail view in Vertical sec.- tion of the friction devices of the dipperopcrating mechanism.

Figured is a detail view of the dipper 'handle operating mechanism with 4 parts 26 shown in section; and I Figure 5 is a detail view in cross-section taken on'line 5-5 of Figured? f Referring now to details shown in the drawings, myinvention is illustrated as ape so" lied to a power shovel of the dipper ii mec a5 aving the motor and main operatin nism carried on a frame 1, which ame is axis on a base 2. The base 2 is provided with propelling mechanism of an suitable form, herein consisting of'a'n an ass tread mechanism 3. The shovel4 is of am ordina dipper type having a. handle 5 provided wit a rack 6, engaging a pinion 7 carried 40 on a boom '8', the latter being arranged at the front end of the main frame but so as to" be raised or lowered by suitable draft means, such as a cable .10, suitablycontrolled from the main frame. -The. dipper 4 is further connected for operation by ineans of a single .cable 11 passing. over-a sheave 12"on th e upper end of the boom'S and wound upon a main operating drum- 13.

Referring more particularly ject-matter of the present invention which relatestothe means forcontro the Inovement of the dip r'handle-fi, provide a v on ashaft91 transversely of thefrontend of the main frame ,1. A

vided with a gear 102 thereon (see Figure a plurality of planetary gears 92'-' -92 car-v 0t 7 ried on a rotatable member 97 The outer peripheries of the planetary gears engage an internal gear 92? on'the drum member 96 integral with the drum 90. a

A friction band 96 engages the drum similar friction band 9'7 restrains rotation of the planetary member 97 when it is desired to effectuate the driving connection.

through gears 92 in the usual manner, thus reversing the direction of rotation. A pair of cables 99 and-99' are wound upon the drum 90. The ends of said cables V are suitably connected to said drum, as.- for instance 1) clips 99 and 99, and said cables are 'woun in opposite directions from their connecting points, as will appear from Fig;

ures 4 and 5. The two cables extend 'forwardly and downwardly from the drum and over idler pulleys 100 mounted on the. boom 8 adjacent its point of pivotal con -nection with the frame 1 and from thence -.the' cables extend upwardly and are wound about a drum 101 carried .on the boom ad-L- jacent the pinion 7. Thedrum 10.1 is. pro-- 1) engaging a gear 103. which rotates the 6 The cables 99 and 99 are wound in reverse directions on the drum 101, in a manner "more the brakebandfifiirnay be operated so asto maintain thedipper handle in any desired position. Means are also provided'for' 9 cables 99 and 99 in position'and-adjusting'.

facilitating the initialiadjustment of the their tension upon the drums 90 and 101'."-

In the fornifshown bothof the drums are '1 which will hereinafter be more specifically described, but the general arrangement is provided with helical grooves in which the cables are wound. Referring now to the drum 101, which is best shown in cross-- section in Figure 4 it will be seen that I provide means -whereby the drum body is split on a transverse plane so as to provide two portions 111 and 112 at opposite ends thereof. These portions are loosely mounted on sleeves 111 and 112*, respectively, both being keyed to rotate as a unit with the shaft 98 and sleeves 111 and 112*.- The sleeves 111 and 112 each have worm gears 113 at their outer ends, engaging the toothed pei-iphery 113 of the adjacent drum portion; This arrangement permits either drum portion to be turned separately in either direction with respect to the shaft 98, by applying a crank of the usual kind on the squared end 113 of either of the worms 113. The ends of cables 99'and 99* are connected respectively to the portions 111 and 112 and wound in opposite directions thereon.

Among the advantages of the'construction above described is the provision of two separate cables 99 and 99" adapted to be wound in opposite directions upon the drums 90 and 101 but having their points of connection with drum 101 rotatable in either direction relative to each other by means of the split drum connection above described. This arrangement permits ready replacement or repair of the cables connecting the two drums with far greater rapidity and facility than has heretofore been pos= sible when the connecting cables consisted of a single strand having its center portion wound around one of the drums, as for instance the drum 90, and with its two end portions connected to the other drum 101. With two separately-attachable cables 99 and 99 each cable may be adjusted at opposite ends to the desired tension and number of turns desired on both drums-independently of the other. cable with far greater ease and rapidity than the laborious operation of fitting and, winding a single cable. Inasmuch as these cables are subject to considerable wear and frequent replacement,

this'feature presents a considerable saving in time and labor. A further advantage of a two cable-connection is that one cable may be replaced independently of the other when it begins to show wear, instead of requiring replacement of a double length of cable.

A further advantage is the provision of independent adjustment means for the two ends of the cables on drum 101. It ismanifestly desirable to maintain a constant tensionon both of the cables 99 and 99" during operation and at the same time" maintain a V substantially equal amount of cable upon the two drum portions 111 and 112 to repreerative connection with said handle moving means, two drums mounted concentrically with said shaft, flexible cable actuating means including two cable portions each con nected with one of said drums, means for 'independently rotating both of said drums with respect to said shaft, and-locking means for connecting said drums in various adusted positions.

.2. In a device of' the class described, a

frame having a boom mounted thereon, a dipper provided with a handle, a rack on said handle having engagement with a pinion on said boom, a rotatable member having operative connection with said pinion, a pair of drums mounted concentrically with said rotatable member, flexible cable actuating means including two cable portions each connected with one of said drums. and means for positively rotating either of said drums respective to said rotatable member.

3. In a device of the class described, a

'frame having a boom mounted thereon, a

dipper provided with a handle, means on said boom for reciprocably movin said handle relative to said boom, and including a rotatable member, a pair of drums mounted concent-rically with said rotatable member,

flexible cable actuating means including two cable portions each connected with one of said drums. and means for positively rotat ing either of said drums respective to said rotatable member comprising a. self-locking worm gear connection between each of said drums and said rotatable member.

4. In a device of the class described, a

frame having a boom mounted thereon, a dipper provided with a handle, means on said boom for reciprocably moving said handle relative to said boom. said means includinc ing a pair of drums having differential operative connection therewith, and flexible actuating means including a second drum mounted on" the frame and two cable sections each independentlyconnected at opposite ends "ietween said last named drum and one of said pair of drums.

Signed at. Lima, Ohio, this 17th day of July, 1925. v 7 JOHN D.-RAUCH. 

